Posted on by

BIOSKETCH: I was born in Trivandrum, India, received my Bachelors in Mechanical Engineering from Kerala University (2011) and my Masters in Applied Mechanics from the Indian Institute of Technology, Delhi (2014). I spent one year as a research assistant at Karlsruhe Institute of Technology, Germany, to complete my master thesis: microstructure characterization and modeling of PTFE/GF composites incorporating recyclate under the scholarship of Deutscher Akademischer Austausch Dienst (DAAD). I worked as a Design Engineer for two years in QuEST Global India Pvt Ltd, Bangalore, in which I spent 6 months in Toshiba Fuchu, Tokyo. I selected honors include DAAD Scholarship and qualified GATE (99 percentile).

              Currently, I am working as a Marie Skłodowska-Curie ESR (ITN-ETN) on “Dynamic damage in ductile materials accounting for micro-inertia and void shape effect”. This multidisciplinary research program is a great opportunity to pursue a scientific career in mechanical engineering (academic as well as industrial). This ITN program will be a ladder to my future career.”

PUBLICATIONS

 
CONFERENCES

 
TRAINING COURSES

  • Early 2017 Manoj will follow 2 technical courses on different aspects of solid mechanics:
    • Course on Characterization of Materials under Dynamic Loading. October 2016 – January 2017. 20 hours.
    • Course on Modelling of Crystal Behavior and Textures. April – June 2017. 24 hours.
  • French course: Manoj will follow the second semester of the academic year a French course specific delivered by the UL for foreign students and professors willing to learn or improve their knowledge of French.

 

MONTHLY REPORT

22/12/2016:

“After the EMI conference in Metz and welcome party of PhD students in Metz & Nancy. I would like to thank my Supervisor and colleagues for helping me to know about the beauty of this city, places like Cathedral, the Moselle river near LEM3, Centre Pompidou-Metz, Temple Neuf on the Moselle river, etc. This small beautiful French town is situated near the river called Moselle and the signature of this town is the historical & architectural background. The Christmas at Metz (Noel de Metz) is one of the best in Europe and the Christmas markets are so attractive.”

08/05/2017:

We have started the PhD on dynamic damage on October 20th. The goal of the PhD is to focus on materials containing cylindrical voids. So, a 2D approach is proposed. Based on the previous works in the team and works of the literature [1-3], the behavior of porous materials with cylindrical voids under dynamic conditions is assessed by a micro-mechanical approach. A RVE for the porous material is considere , which is defined as a cylindrical unit cell. Using an approximation velocity field and the principle of virtual work, a relationship is found between macroscopic stress and strain rate. The yield function developed by Gurson [3] has been adopted to integrate an appropriate model for the quasi-static behavior of porous material with cylindrical voids. For the dynamic contribution, a velocity field proposed by Gurson [3] for plane strain condition has been adopted. Mathematical developments have been carried out and a consistent set of equations has been used to the determination of the response of porous material with cylindrical voids under dynamic loading. The modeling is analytical; dichotomy method is used to solve the set of nonlinear equations (Fortran has been used). Illustrations are shown for hydrostatic tension, hydrostatic compression, triaxiality and for variations of different parameters (density, flow stress, initial porosity and initial void size) under plane strain condition. We are currently focusing on General plane strain and started working on the velocity field for the general plane strain condition to add dynamic condition. In addition, a comparison against results obtained from numerical simulations (using Abaqus) will be performed to validate the model. The model will be published in a peer review journal.

[1] Molinari, A., & Mercier, S. (2001). Micromechanical modelling of porous materials under dynamic
loading. J. Mech. Phys. Solids, 49, 1497–1516.
[2] Czarnota, C., Jacques, N., Mercier, S., & Molinari, A. (2008). Modelling of dynamic ductile fracture and application to the simulation of plate impact tests on tantalum. J. Mech. Phys. Solids, 56, 1624–1650.
[3] Gurson, A. L. (1977). Continuum theory of ductile rupture by void nucleation and growth : Part I – yield criteria and flow rules for porous ductile media. J. Eng. Mater. Technol., 99, 2–15.

Share this: